Jack's Nutrients Professional 20-20-20 General-Purpose Fertilizer, 25lbBoost your hydroponic garden with reliable, water soluble fertilizer! Jack's Professional line includes premier grade fertilizers formulated with highest quality components and manufacturing controls. The general purpose industry standard, 20 20 20 is great for maintaining plants in garden center and growing facilities. It provides fast green up and great foliar expansion due to the high percentage of ammonium and urea nitrogen plus balanced